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Preparing for the Cluster Setup: Availability Zones and SSH Keys

Preparing for the Cluster Setup: Availability Zones and SSH Keys

In this lesson, we will set up availability zones and create SSH keys.

Setting Up the Availability Zones

In this lesson, we will decide which availability zones should we use. So, let’s take a look at what’s available in the us-east-2 region.

Shell
aws ec2 describe-availability-zones \
    --region $AWS_DEFAULT_REGION

The output is as follows.

Shell
{
    "AvailabilityZones": [
        {
            "State": "available", 
            "RegionName": "us-east-2", 
            "Messages": [], 
            "ZoneName": "us-east-2a"
        }, 
        {
            "State": "available", 
            "RegionName": "us-east-2", 
            "Messages": [], 
            "ZoneName": "us-east-2b"
        }, 
        {
            "State": "available", 
            "RegionName": "us-east-2", 
            "Messages": [], 
            "ZoneName": "us-east-2c"
        }
    ]
}

As we can see, the region has three availability zones. We’ll store them in an environment variable.

📝 A note to Windows users

Please use tr '\r\n' ', ' ...

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